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A Varied VSVM Strategy for Balancing the Neutral-Point Voltage of DC-Link Capacitors in Three-Level NPC Converters

Author

Listed:
  • Shi Weng Gui

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Zhen Jun Lin

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Sheng Hua Huang

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

In the research field of multilevel converters, three-level NPC (neutral-point-clamped) converters, which unfortunately may cause the deviation of the neutral-point voltage of DC-link capacitors, are widely discussed. Theoretically, virtual space vector modulation (VSVM) could guarantee the balance control of the neutral-point voltage. However, there still exist some uncontrollable space vector regions. Based on VSVM, this paper proposes a varied virtual space vector modulation (VVSVM) method for three-level NPC converters. Under complete modulation conditions, this method can control the balance of the neutral-point voltage of DC-link capacitors by adjusting the duty cycle of small vectors and regulating the current generated by virtual medium vectors. Compared with commonly used VSVM methods and mixed modulation strategies, this method is simpler and more practical. The effectiveness and validity of this method are verified by simulations and experiments.

Suggested Citation

  • Shi Weng Gui & Zhen Jun Lin & Sheng Hua Huang, 2015. "A Varied VSVM Strategy for Balancing the Neutral-Point Voltage of DC-Link Capacitors in Three-Level NPC Converters," Energies, MDPI, vol. 8(3), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:3:p:2032-2047:d:46791
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    Citations

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    Cited by:

    1. Yap Hoon & Mohd Amran Mohd Radzi & Mohd Khair Hassan & Nashiren Farzilah Mailah, 2017. "A Refined Self-Tuning Filter-Based Instantaneous Power Theory Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filters under Non-sinusoidal Source Voltage Condit," Energies, MDPI, vol. 10(3), pages 1-21, February.
    2. P. Madasamy & R. K. Pongiannan & Sekar Ravichandran & Sanjeevikumar Padmanaban & Bharatiraja Chokkalingam & Eklas Hossain & Yusuff Adedayo, 2019. "A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter," Energies, MDPI, vol. 12(22), pages 1-24, November.
    3. Yap Hoon & Mohd Amran Mohd Radzi & Mohd Khair Hassan & Nashiren Farzilah Mailah, 2017. "A Self-Tuning Filter-Based Adaptive Linear Neuron Approach for Operation of Three-Level Inverter-Based Shunt Active Power Filters under Non-Ideal Source Voltage Conditions," Energies, MDPI, vol. 10(5), pages 1-28, May.
    4. Maosong Zhang & Ying Cui & Qunjing Wang & Jun Tao & Xiuqin Wang & Hongsheng Zhao & Guoli Li, 2019. "A Study on Neutral-Point Potential in Three-Level NPC Converters," Energies, MDPI, vol. 12(17), pages 1-22, September.
    5. Yap Hoon & Mohd Amran Mohd Radzi & Mohd Khair Hassan & Nashiren Farzilah Mailah, 2016. "DC-Link Capacitor Voltage Regulation for Three-Phase Three-Level Inverter-Based Shunt Active Power Filter with Inverted Error Deviation Control," Energies, MDPI, vol. 9(7), pages 1-25, July.

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